Spinodal decomposition ranges of Al$_x$Ga$_{1-x}$N$_y$P$_{1-y}$ and Al$_x$Ga$_{1-x}$N$_y$Sb$_{1-y}$ alloys

S.F. Díaz Albarrán, V.A. El, ukhin.


Spinodal decomposition ranges of low $N$-content Al$_x$Ga$_{1-x}$N$_y$P$_{1-y}$ and Al$_x$Ga$_{1-x}$N$_y$Sb$_{1-y}$ alloys grown on GaP (001) and GaSb (001) substrates, respectively, are described. The alloys are considered according to the strictly regular approximation. In the analysis we take into account the transformations of the bonds and strain, coherency strain, and elastic energies. The spinodal decomposition ranges of the alloys with compositions $0\le x\le0.4$, $0\le y\le0.05$ are demonstrated up to temperatures of 1100$^\circ$C. It is shown that the enlargement of Al and N concentrations dramatically increases the phase separation temperature.


III-V quaternary alloys; Spinodal decomposition

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REVISTA MEXICANA DE FÍSICA, year 67, issue 2, March-April 2021. Bimonthly Journal published by Sociedad Mexicana de Física, A. C. Departamento de Física, 2º Piso, Facultad de Ciencias, Universidad Nacional Autónoma de México, Ciudad Universitaria, Alcaldía Coyacán, C.P. 04510 , Ciudad de México. Apartado Postal 70-348. Tel. (+52)55-5622-4946, https://rmf.smf.mx/ojs/rmf, e-mail: rmf@ciencias.unam.mx. Chief Editor: José Alejandro Ayala Mercado. INDAUTOR Certificate of Reserve: 04-2019-080216404400-203, ISSN: 2683-2224 (on line), 0035-001X (print), both granted by Instituto Nacional del Derecho de Autor. Responsible for the last update of this issue, Technical Staff of Sociedad Mexicana de Física, A. C., Fís. Efraín Garrido Román, 2º. Piso, Facultad de Ciencias, Universidad Nacional Autónoma de México, Ciudad Universitaria, Alcaldía Coyacán, C.P. 04510 , Ciudad de México. Date of last modification, March 1st., 2021.

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